CP2110-EK
Rev. 0.3
7
7.4. VDD and VIO Power Connector (J2)
This header (J4) is included on the evaluation board to provide several power options. The following describes the
function of each pin:
Pins 1,3: Connects CP2110 VIO input (pin 5) to CP2110 VDD (pin 6). Remove the shorting block to power
VIO from an external source.
Pins 2,4: Connects the main +VDD_A net to the CP2110 VDD (pin 6). The main +VDD_A net powers the
RS-232 transceiver on the evaluation board.
7.5. REGIN Power Connector and Self-Powered Mode Connector (J8, J12)
The J8 header is used to connect the CP2110 REGIN pin (pin 7) to the VBUS source from the USB connector
(default) or to the CP2110 VDD pin (pin 6). When connected to the VBUS source, the device is intended for bus-
powered operation. When connected to the CP2110 VDD pin, the device is intended for self-powered operation.
When in self-powered operation, an external power source can be connected to the J12 header to power the VDD
pin directly.
7.6. .SUSPEND LED Connector (J9)
The J9 header is used to connect the CP2110 SUSPEND pin (pin 17) to the D10 red LED. When the LED is on, the
device has enumerated with the PC operating normally. When the LED is off, the device has not yet enumerated or
is in the USB Suspend state.
